Relays & Signal Conditioning

At RS, we stock a large choice of relay switch products for a wide variety of applications. Within our range, you will find products such as latching and non-latching relays, solid state relays, interface relays and reed relays. All our relay switch products are from trusted electrical relay suppliers such as our own RS PRO brand, Omron, Finder, TE Connectivity, Panasonic, Phoenix Contact and more.

What is a relay?

Relays are a type of switch that operate electronically to turn AC or DC currents on or off within an electrical circuit. Relays operate similar to a typical light switch, where power is switched on and off when the switch lever is moved, but the main difference lies in how a relay is operated by an electrical circuit rather than manually pressed.

Relays have many different uses and are often utilised in situations where isolation is necessary or when a circuit needs to be controlled with a low-power signal. There are also specialised types of relay switches that are used for very high-power applications; these are referred to as contactors.

Types of relay

Electromechanical Relay (EMR): An electromechanical relay uses a physical moving arm, triggered by a voltage applied to the relay coil, this arm connects contacts within the output component of the relay. The movement of the arm allows an electrical circuit to be completed, allowing AC or DC current to flow to the connected equipment. The physical components within the relays commonly make a "click" sound, which can be used as an audible operation indicator.

Solid State Relay (SSR): Solid state relays provide a similar function to an EMR but these do not contain any moving components, increasing long-term reliability. SSR' feature semiconductor switching elements; typically thyristors, triacs and diodes that transmit and energise the output signal. When activated, the input signal acts like a switch that allows a high-voltage signal to pass through the SSRs output components.

Shop relays, relay accessories, and signal conditioners isolators at RS today.

Relay Accessories
Relay Accessories
Relays
Relays
Signal Conditioners & Isolators
Signal Conditioners & Isolators

17174 Products showing for Relays & Signal Conditioning

843 of 859
Current Monitoring Relay, 3 Phase, DIN Rail
  • RS Stock No. 658-361
  • Mfr. Part No. S1MMmA500VLM
Each
SGD722.50(exc. GST)
Phoenix Contact Interface Relay, DIN Rail Mount, 12V dc Coil, SPDT, 1-Pole
  • RS Stock No. 174-3543
  • Mfr. Part No. 2909518
Each (In a Pack of 10)
SGD43.689(exc. GST)
Phoenix Contact PSR 1 Auxiliary Contacts Safety Relay 24V dc, Single/Dual-Channel 3 Safety Contacts
  • RS Stock No. 207-2688
  • Mfr. Part No. 2702411
Each
SGD373.34(exc. GST)
Omron Plug In Power Relay, 100 → 110V dc Coil, 5A Switching Current, 4PDT
  • RS Stock No. 102-691
  • Mfr. Part No. MM4XPN DC100/110
Each
SGD127.81(exc. GST)
TE Connectivity PCB Mount Signal Relay, 5V dc Coil, 2A Switching Current, DPDT
  • RS Stock No. 276-3902
  • Mfr. Part No. 4-1393789-9
Each (On a Reel of 500)
SGD4.469(exc. GST)
Finder PCB Mount Relay, 6V dc Coil, 10A Switching Current, SPDT
  • RS Stock No. 248-1786
  • Mfr. Part No. 361190064011
Each (In a Pack of 25)
SGD4.296(exc. GST)
Siemens 3RF2 Series Solid State Relay, 90 A Load, Chassis Mount, 600 V ac Load, 230 V ac Control
  • RS Stock No. 275-823
  • Mfr. Part No. 3RF2190-2AA26
Each
SGD193.04(exc. GST)
Panasonic AQ-1 Series Solid State Relay, 10 A Load, PCB Mount, 250 V rms Load
  • RS Stock No. 247-4148
  • Mfr. Part No. AQ10A2-ZT4/32VDC
Each
SGD34.04(exc. GST)
Better World
Schneider Electric Harmony Relay RSL Series Interface Relay, Plug In, SPDT, 6A Load
  • RS Stock No. 256-4755
  • Mfr. Part No. RSL1PVFU
1 Box of 10
SGD323.99(exc. GST)
Omron Non-Latching Relay, 48V dc Coil, 5A Switching Current, DPDT
  • RS Stock No. 215-5511
  • Mfr. Part No. G2R-2-SND DC48(S)
Each
SGD24.64(exc. GST)
TE Connectivity PCB Mount Power Relay, 24V dc Coil, 10A Switching Current, SPDT
  • RS Stock No. 162-1683
  • Mfr. Part No. PCH-124D2H
Each (In a Bag of 100)
SGD2.841(exc. GST)
Celduc SO8 Series Solid State Relay, 50 A Load, DIN Rail Mount, 690 V ac Load, 265 V ac/dc Control
  • RS Stock No. 309-847
  • Mfr. Part No. SO885960-WF151
Each
SGD189.93(exc. GST)
Gefran GQ Series Solid State Relay, 75 A Load, Surface Mount, 600 V ac Load, 32 V ac/dc Control
  • RS Stock No. 600-906
  • Mfr. Part No. GQ-75-60-D-1-0
Each
SGD168.52(exc. GST)
Relay module, 48 V
  • RS Stock No. 600-283
  • Mfr. Part No. 1123750000
Each
SGD27.51(exc. GST)
Gefran GRZ-H Series Solid State Relay 3 Phase, 10 A Load, DIN Rail, Panel Mount, 480 V ac Load, 260 V ac/dc Control
  • RS Stock No. 601-765
  • Mfr. Part No. GRZ-H-3P-3S-10-48-A-2-0-0
Each
SGD552.48(exc. GST)
Carlo Gavazzi RGC3P Series Solid State Relay, 71 A Load, DIN Rail Mount, 660 V ac Load, 10 V dc Control
  • RS Stock No. 188-5289
  • Mfr. Part No. RGC3P60V65C1DFM
Each
SGD1,004.34(exc. GST)
Phoenix Contact Interface Relay, DIN Rail Mount, 110 V dc, 120V ac Coil, DPDT, 2-Pole
  • RS Stock No. 174-3510
  • Mfr. Part No. 2909515
Each (In a Pack of 10)
SGD45.553(exc. GST)
Hongfa Europe GMBH PCB Mount Latching Power Relay, 12V dc Coil, 20A Switching Current, SPST
  • RS Stock No. 176-2937
  • Mfr. Part No. HF115F-L/12-H3L2TF(610)
Each
SGD4.35(exc. GST)
Finder PCB Mount Relay, 24V dc Coil, 16A Switching Current, SPDT
  • RS Stock No. 248-1359
  • Mfr. Part No. 416190240011
Each (In a Pack of 20)
SGD12.197(exc. GST)
TE Connectivity PCB Mount Latching Signal Relay, 12V dc Coil, 2A Switching Current, DPDT
  • RS Stock No. 515-571
  • Mfr. Part No. V23079-B1203-B301
Each
SGD4.98(exc. GST)
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